Troubleshooting Shift Problems - Mercury MerCruiser 3.0 MPI Installation Manual

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SECTION - 8
a.
b.

Troubleshooting Shift Problems

NOTE: The following information is provided to assist an installer in troubleshooting if hard shifting
or chucking/racheting is encountered when shifting into FORWARD gear.
1. When installing the control box in the side panel of the boat, ensure that the cables have
enough clearance to operate. This is necessary because the cables move up and down when
the shift handle is moved. If the control box is mounted too far back toward any fiberglass
structure, the cables will be interfered with; this will cause very hard shifting.
NOTE: The control box housing can be rotated in 30 degree increments to improve cable routing.
90-899883183 DECEMBER 2007
On right‑hand propeller rotation drive units, while turning the propeller shaft clockwise,
move the remote control shift handle into full reverse position. The clutch should engage
before the shift lever comes to a stop. If the clutch does not engage, loosen the adjustable
stud on the shift lever and move it up in the slot until the clutch engages with the reverse
gear. Tighten the stud and shift the remote control several times and stop in reverse to
check the shift cutout switch position. The pin must be centered.
On left‑hand propeller rotation drive units, while turning the propeller shaft clockwise,
move the remote control shift handle into full forward position. The clutch should engage
before the shift lever comes to a stop. If the clutch does not engage, loosen the adjustable
stud on the shift lever and move it up in the slot until the clutch engages with the forward
gear. Tighten the stud and shift the remote control several times and stop in forward to
check the shift cutout switch position. The pin must be centered.
a
b
a -
Adjustable stud
b -
Gear indicator plunger
Proper cable bend
c
32847
c -
Shift interrupt switch switch plunger
7873
REMOTE CONTROLS
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